Title:
ALL-METAL DOWNHOLE MOTOR BASED ON MULTI-STAGE DOUBLE PLUNGER-ECCENTRIC GEAR MECHANISM
Document Type and Number:
WIPO Patent Application WO/2021/077584
Kind Code:
A1
Abstract:
An all-metal downhole motor based on a multi-stage double plunger-eccentric gear mechanism, comprising a flow distribution shaft (8), an outer pipe (1), and a multi-stage eccentric gear driving mechanism which are arranged coaxially. The flow distribution shaft (8) is suspended and supported in the outer pipe (1) by means of the multi-stage eccentric gear driving mechanism. The plunger structure of the downhole motor is high in machining precision, low in cost and good in plunger-type dynamic sealing effect. The torque is transmitted by means of a planetary gear train with an eccentric structure, so that the working efficiency of the downhole motor is improved. The downhole motor adopts an all-metal structure and is resistant to the high-temperature environment; the plunger is simple in structure, good in sealing effect and small in machining difficulty of the curved surface of the downhole motor; the problem of poor metal sealing effect is effectively solved; and meanwhile, a modular structure is adopted, the multi-stage plunger structure can be installed for relay driving, the double-plunger structure is adopted to ensure that the internal force is balanced and stable, and the torque of the downhole motor is increased.
More Like This:
| WO/2011/090858 | FLOW REGULATOR FOR DOWNHOLE PROGRESSING CAVITY MOTOR |
| WO/2000/024997 | DOWN HOLE MOTORS AND METHODS FOR THEIR OPERATION |
Inventors:
WANG YU (CN)
LU JIAXING (CN)
WANG ZHIQIAO (CN)
LIU BAOLIN (CN)
ZHOU QIN (CN)
CHANG TENGTENG (CN)
LU JIAXING (CN)
WANG ZHIQIAO (CN)
LIU BAOLIN (CN)
ZHOU QIN (CN)
CHANG TENGTENG (CN)
Application Number:
PCT/CN2019/126387
Publication Date:
April 29, 2021
Filing Date:
December 18, 2019
Export Citation:
Assignee:
UNIV CHINA GEOSCIENCES BEIJING (CN)
International Classes:
E21B4/02; F03C1/247; F03C1/26; F03C1/32; F03C1/36
Foreign References:
| CN210829061U | 2020-06-23 | |||
| CN1401894A | 2003-03-12 | |||
| CN1279366A | 2001-01-10 | |||
| CN107060637A | 2017-08-18 | |||
| US20170051732A1 | 2017-02-23 | |||
| CN109441708A | 2019-03-08 | |||
| CN203835612U | 2014-09-17 | |||
| US3972659A | 1976-08-03 |
Attorney, Agent or Firm:
BEIJING WEIZHENG PATENT AGENCY CO., LTD. (CN)
Download PDF: